Consew P1255RB User manual

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®

P-S ER IE S

by

P1255RB

P2339RB

PartsManual

1. P2339RBArmparts…………………………………………………………………………………………………………….11~14

2. P1255RBArmparts…………………………………………………………………………………………………………….15~18

3. Uppershaftandpresserfootparts…………………………………………………………………………………….19~20

4. P2339RBArmparts…………………………………………………………………………………………………………….21~24

5. P2339RBArmparts…………………………………………………………………………………………………………….25~28

6. P2339RBArmparts…………………………………………………………………………………………………………….29~32

7. P2339RBArmparts…………………………………………………………………………………………………………….33~36

8. P2339RBArmparts…………………………………………………………………………………………………………….37~38

9. P2339RBArmparts…………………………………………………………………………………………………………….39~40

10. P2339RBArmparts…………………………………………………………………………………………………………….41~42

11. P2339RBArmparts…………………………………………………………………………………………………………….43~44

12. P2339RBArm

part

s…………………………………………………………………………………………………………….45~46

1

2

small

big

B

A

B

A

oil felt

-1-

Both the models adopt straight twin-needle and two horizontal hooks with auto lubrication for thread

looping, sliding lever for thread take up to form two lines of lockstitch seam. The upper shaft and lower

shaft is connected by ball bearing and driven by teeth-type synchronic belt; plunge oil pump lubrication

system. They adopt the compound feed mechanics of feed dog, needle bar and presser foot, even if for long

stitch length and long material, They can deal with them freely.

They are widely used in factories of suitcase, tent, cushion, leather goods, apparel, mat, etc..

The difference between the two models:

35% adopts twin-needle, two large horizontal hooks with auto lubrication. With the parts it can

form ten different needle gauges.

35% adopts single needle and form single line double lockstitch form.

1. Brief introduct oni

1 Application: medium and heavy duty materials

2 Max. sewing speed: 2000 spm

3 Max. Stitch length : 9 mm

4 Needle bar stroke: 36 mm

5 Presser foot lift height: 8mm(by hand); 16mm(by knee)

6 Hook: large horizontal hook with auto lubrication

7 Needle: D3; 17 Nm125~180

8 Lubrication: pump auto lubrication (partial of manually oiling)

9 Needle gauge: (Twin-needle) 6.4, 3.2, 4, 4.8, 8, 9.5, 12.7, 16, 19, 25.4

10 Motor power: 0.37 kw (clutch motor)

2. Main Technical Specification

3.1 Installation

3.1.1 Location of the machine

To ensure a smooth running, the machine should

be located on rigid and flat floor. The insert of

rubber mat between machine stand and floor is

recommended for further reducing the running noise

and vibration.

3.1.2 Oil Reservoir Installation(Fig.1)

Put the oil reservoir into the table cutout, and

place the four cushions on the four corners of the

cutout, and place oil felt into the oil reservoir.

3.1.3 Mounting machine head(Fig.2)

Make the hinge A of machine head engaged with

hinge socket B on the table, then turn the machine

head freely till it is seated on the frame of table

cutout.

()

3. Installation and preparation

B

A

C

B

3

4

5

A

C

B

-2-

3.1.4 Knee control presser foot lifter installation(Fig.3)

a. Installing

Install Connector A , Bell Crank B , Bell C

in the order shown in Fig.3.

b. Adjustment (Fig.4)

In the order of the following:

1.When the presser foot is at its lowest posi-

tion, keep the crank in the position shown by b

in the figure, turn Knee Control Stop Adjusting

Screw C to touch with the oil reservoir, and

tighten the nut of Screw C .

2. When operate by knee, the presser foot lift

volume is controlled by Screw B . Turn the

presser foot lever down, make the bell in the po-

sition shown by a in the figure, lift the presser

foot to 13 mm, adjust Screw B to touch the oil

reservoir. Then tighten the nut of Screw B .

3.1.5 Installing the motor (Fig.5)

Align machine balance wheel belt groove A with

motor pulley belt groove B by moving the motor C

leftward or rightward. Be sure the belt is not touch

with table.

() () ( )

()

() ( )

A

B

C

D

G

F

E

10 - 12 mm

D

C

B

A

20 30

6

7

8

C

A

B

-3-

D

E

A

B

A

3.1.6 Connecting the clutch lever to the pedal (Fig.6)

1)The optimum tilt angle of pedal A with floor

is approx.30 degree.

2)Adjust the clutch of the motor so that clutch

lever C and draw bar B run in line.

3)The machine balance wheel should rotate coun-

terclockwise for normal sewing when view from opposite

side of balance wheel G . The motor is rotated in the

same direction. The rotation can be reversed by rever-

sing (turn over 180 deg.)the plug of motor.

4)Adjust the tension of V-belt F by moving the

motor vertically. The proper tension of V-belt is a slack

of 10-12mm when the belt is depressed at the belt span

by finger.

3.1.7 Installing the bobbin winder (Fig.7)

Align pulley B of bobbin winder with outside of

belt C and should be kept a proper clearance between

them , so that pulley B could be contacted with belt

after the stop latch thumb lever A depressed, thereby

belt drives the pulley B while machine running. After

check bobbin winder is in parallel with belt slit E

of table, fastened by two wood screws D .

3.1.8 Installing the thread spool stand (Fig.8)

Locate thread spool stand at the right front of

the table, note that spool rest may not obstruct when

machine head is turned backward, then tighten wood

screw.

3.2 Preparation

3.2.1 Cleaning the machine

Before delivery, the machine parts are coated with

rust preventive grease, whice may be hardened and con-

taminated by dust during storage and shipment. The

grease must by removed by clean cloth with gasoline.

()

() ()

()

( )

()

9

10

11

12

oil mark

oil screen

-4-

3.2.2 Examination

Though every machine is confirmed by strict inspec-

tion and test before delivery, the machine parts may be

loosed or deformed after long. distance transportation

with jolt. A thorough examination must be performed

after cleaning the machine . Turn the balance wheel to

see if there is running obstruction, parts collision,

uneven resistance or abnormal nosie. If these exist,

adjustment must be made accordingly before run.

3.2.3 Precaution before Start

a. Oiling (Fig.9)

Oil amount should be filled according to the marks

in the oil reservoir. Mark (H) refers to the highest

of oil amount; (L) refers to the lowest, be careful that

the oil amount should not be lower than Mark (L),

otherwise the machine parts can not be fed with oil

and cause overheat and collision.

Be sure to use machine oil HA-8 or HJ-7

b. When the machine starts for the initial time or

reuse after a long period of time, the proper oil

amount should be filled in sections of machine shown

by arrows in Fig10,11.When it is in operation, observe

the oil sparking in oil screen to check the oil

condition.

Note: when the machine needs drop oiling , do not

start before drop oiling.

c. When a new machine starts running, for extending

its life, please run at a medium and low speed (1000

spm) for about a month and then raise the speed

gradually.

d. Please turn off the power when it is not in use

or the operator leaves away from it .

e. Replace the oil every month. When replacing,

fully drain off the old oil in the reservoir and add

the new one.

f. The needle gauge options are: 6.4, 3.2, 4, 4.8, 8,

9.5, 12.7, 16, 19, 25.4 For getting it , the throat plate,

presser foot or alternating foot , needle holder, feed

dog, left and right sliding plates, thread guide should

be changed. It is provided with 6.4mm when it leaves

off the factory, For the other size, the relevant parts

can be ordered from the factory.

13

14

A

B

C

D

E

G

H

2

1

F

-5-

long groove

long groove leftward

clearance

(a)

(d)

(b)

(c)

A

4.1 Coordination between needle, thread and sewing

material

Please use needle D3; 17,Nm125-180.The coarseness

of needle should be in accordance with the nature of

material. If stitch on heavy duty material with a slim

needle, the needle will be easily bent, skip or thread

breakage occurs, on the contrary, stitch on tightly woven

material with a very coarse needle, the material will

be destroyed with over-big needle. So the needle and

thread should be properly selected.

4.2 Needle installation(Fig.13)

Turn the balance wheel to lift needle bar to the

highest position, loosen Needle Set Screw A , fully

insert the needle shank upto the bottom of needle

socket, keeping the long grooves of the two needles

opposite with each other, then tighten Screw A , For

single needle, keep the long groove of needle facing

the left of the operator. See Fig (b).

Note: Fig.(c) : insufficient insertion.

Fig.(d) : wrong direction of needle long groove

in insertion.

4.3 Winding the Bobbin thread

4.3.1 Winding method(Fig.14)

1) Install bobbin A to bobbin winder spindle B .

2) Pass thread C from spool through the eye 1 on

tension bracket E . Pass ti between tension discs 2 ,

and then wind the end of the thread a few turns on

the bobbin.

3) Push stop latch thumb lever D down to lock the

bobbin, the winder pulley F is thereby pressed on

belt G .

4) Start the machine to wind thread.

Note when thread is wound without sewing opera-

tion, be sure to keep the presser foot lifted.

5) When the thread is fully wound, the bobbin winder

stop latch automatically release the bobbin winder,

thus stopping the winding motion.

()

() ()

()

4. Operation

single needle

L7 L5 L4 L3' L3 L2' L2 L

R7 R1

15

16

17

-6-

A

B

C

D

E

AAABB

L11 R11

L8

L9

L10

L11

L12

L13

R8

R9

R10

from right to left from left to right

detail chart

thread

L6

R6

R11

R12

R13

R5

R2

R3

R4

4.3.2 Winding adjustment (Fig.15)

1) Wound bobbin thread should be neat and tight,

if not , adjust the thread tension by turning tension

stud thumb nut A of bobbin winder tension bracket.

Note: nylon or polyester thread should be wound

with light tension , otherwise bobbin D might be

broken or deformed.

2) When the wound thread layer does not present a

cylindrical shape as in Fig.15a, loosen tension bracket

screw B and move tension bracket C leftward or

rightward. If thread is wound as shown in Fig, 15b,

move the tension bracket rightward, while if thread

is wound as shown in Fig.15c,move the tension bracket

leftward, After adequately positioning the tension

bracket, tighten screw B .

3) Do not over fill the bobbin , the optimum capacity

of thread will fill about 80% of bobbin ouside diameter,

this can be adjusted by stop latch screw E .

4.3.3 Threading (Fig.16)

Every thread should be drawn through Thread Hole

A , when use light and smooth thread (polyester or long

silk thread), it should be drawn through Hole B , Keep

the thread take-up lever in its highest position , draw

every thread in the following numerical order.

4.3.4 The stitch length and forward and reverse sewing

control (Fig.17)

The stitch length can be regulated by Stitch

Length Dial A . Turn it counter-clockwise to expand

its length and clockwise to shorten its length . The

numbers on Dial A show the sizes of the stitch length

in mm.

For reverse feed, press down Release Feed Lever

C to perform reverse sewing , Release the lever, the

reverse feed lever can reset automatically and the

forward sewing is resumed.

()

() ()

()

21

20

19

18

Normal

A

B

C

-7-

hook

thread

sliding plate

hook

sliding plate

tension adjusting screw

loosen

tighten

inner stop piece

1

2

thread

4.3.5 Placing bobbin (Fig.18)

Note: when bobbin is placed into the bobbin case,

the thread should be wound properly in the correct

direction shown in the figure.

4.3.6 Drawing thread from the bobbin (Fig.19)

a. Draw the thread end to Bobbin Slot (1) shown in

the figure, and pull it out down through the inner

bobbin stop piece.

b. Hold the thread with left hand , turn the balance

wheel slowly and get the bobbin thread, then draw

them a little apart from the presser foot.

5.1 Thread tension adjustment

All forms of stitches are shown in Fig.20.

The normal stitch of sewing machine is shown as

Fig.(A) If stitch is abnormal , the puckering and thread

breakage will occur, and the needle thread tension and

bobbin thread tension should be adjusted so that the

normal stitch can be obtained.

a. If the stitch seam shows as Fig. 20B, indicates

that the needle thread or bobbin thread tension

is too loose , then turn the thread tension screw

counter-clockwise to release the needle thread

pressure; or turn the adjusting screw with a

screwdriver to increase the bobbin thread ten-

sion.( see Fig.20,22 )

5. Machine Adjustment

thread

25

24

23

22

button

balance wheel

pressure adjusting screw

reduce

increase

teeth - belt pulley

shaft

safety clutch device

-8-

needle thread tension

increase

reduce

b. If the needle thread is too loose and the bobbin

thread is too tight, then shows as Fig. 20C, And

turn the thread tension screw clockwise to increase

the needle thread tension; or turn loose the

bobbin lace screw to reduce the bobbin thread

tension. (See Fig. 21, 22)

For special sewing with special thread, the ten-

sion needed can be obtained by adjusting the power and

stroke of the thread take-up spring.

5.2 Adjusting the pressure of presser foot (Fig.23)

The pressure of the presser foot should be adjust-

ed according to the thickness of the sewing materials.

If stitch on heavy duty material, the pressure should

be increased and turn the pressure adjusting screw on

the back of the arm clockwise if reduce the pressure,

turn it counter-clockwise.

5.3 Use and adjustment of the safety clutch device

The function of the safety clutch device is to

prevent the hook and teeth-belt from destroy when the

needle thread is drawn into the hook for adnormal load

during the operation.

5.3.1 The function of the safety clutch device(Fig.24)

a. When the safety clutch device is functioning,

the teeth-belt will remove the load and the rock

shaft will stop rotating, only the upper shaft

rotates, and the machine stops work.

b. Clean off the needle thread which is drawn in

the hook.

c. Turn the shaft of the teeth-belt with hand to

check if the rock shaft can turn smoothly, then

reset the safety clutch device.

5.3.2 Resetting the safety clutch device.

a. While press down the button in the bed surface

with left hand, turn the balance wheel slowly

with right hand in the direction shown in Fig.

25.

26

27

28

stop plate

white mark

eccentric

lower shaft

loosen

tighten

set screw

belt

eccentric

reference line

button

special screw

horizontal shaft crank

upper layer feed reduce

upper layer feed increase

link

b. When the stop plate stops the balance wheel,

more strength is needed to turn the balance

wheel to reset the safety clutch device.

C. Release the button in the bed. So the resetting

of it is OK. (See Fig.26)

5.3.3 Regulating the strength on the safety clutch

device(Fig.27)

a. When the white mark of the eccentric pin aims

at the center of the rock shaft, indicates that

the strength on the safety clutch device is the

minimun.When the white mark points outward, the

strength is properly increased.

b. For regulating the strength of it, move the teeth

- belt and loosen the set screw of the eccentric

pin, and turn the eccentric pin.

c. After regulation, please tighten the set screw.

5.4 Upper feed adjustment (Fig.28)

If the upper and lower feed are not in timing

during sewing, the long hole of the horizontal feed

crank should be adjusted to get the length of upper

feed.

Adjust as the following:

a. Loosen the special screw.

b. Move the special screw upward to reduce the feed

amountor upper layer of material.

c. Move the special screw downward to increase the

feed amount. Theoretically when it is on the

reference line of the horizontal feed crank, the

upper feed amount equals to the lower feed

amount.

d. After adjustment, tighten the special screw.

-9-

30

29

oil amount

adjusting screw

increase

reduce

nut

special screw

crank

increase

reduce

crank link

-10-

5.5 Presser foot lift volume adjustment (Fig.29)

when stitch on the very elastic material or the

thickness of the sewing material is changed. The ad-

justment should be done in the following order:

1. Loosen the special screw.

2. When the centerline distance between the special

screw and the presser foot lift rear crank becomes

shorter, the presser foot lift volume will become longer.

On the country the distance becomes longer, the lift

volume will become shorter.

3. After adjustment, tighten the special screw. The

common presser foot lift volume can be adjusted in

the range of 2-6 mm.

5.6 Hook oil amount adjustment (Fig.30)

It adopts plunger full auto lubrication system,

even at very low speed, it can supply and suck oil very

well. Generally only the hook oil amount can be ad-

justed, the other can not be adjusted. The hook oil

amount can be obtained by the oil amount adjusting

screw. First loosen the nut of the adjusting screw,

turn the scre clockwise to increase the oil amount,

on the contrary reduce the oil amount. After adjust-

ment, tighten the nut.

w

Parts Manual

1.P2339RBArmParts

Line PartNumber Description Qt. Notes

1 300Ͳ1001 Bed 1

2 200Ͳ1003 Arm 1

3 200Ͳ1005 Pin 2 GB/T1176x30

4 300Ͳ1003 Screw 1 GB/T70.1M10x32

5 200Ͳ1009 Screw 3 GB/T5781M10x30

6 300Ͳ1004 Trademark 1

7 200Ͳ1014 Screw 2 GB8272x5

8 200Ͳ1016 Upperthreadguide 1

9 200Ͳ1017 Screw 2 SM11/64"x40/8

10 200Ͳ1018 Backcover 1

11 200Ͳ1019 Screw 15 SM11/64"x40/9

12 200Ͳ1377 Washer 16

13 200Ͳ1020 Cover 2

14 200Ͳ1021 Frontslideplate 1

15 200Ͳ1022 Screw 1 SM3/16"x32/5.4

16 200Ͳ1023 ThreadtakeͲupleverguard 1

17 200Ͳ1024 Backfrontcover 1

18 300Ͳ1007 Screw 1

19 300Ͳ1008 Spring 1

20 300Ͳ1009 Threadretainer 1

21 300Ͳ

1010 Lowthreadfinger

1

22 200Ͳ

1025 Screw 1 SM9/64"x40/6.5

23 200Ͳ1028 Screw 1

24 200Ͳ1029 Screw 1 SM11/64"x40

25 200Ͳ1030 Screw 1 SM9/64"x40

26 200Ͳ1031 Middlethreadfinger 1

27 200Ͳ1032 Rubberplug 2

28 200Ͳ1033 Faceplate 1

29 200Ͳ1034 Screw 2 SM3/16"x28

30 200Ͳ1035 Upperthreadguide 1

31 200Ͳ1036 Guidesetplate 1

32 200Ͳ1037 Setplate 1

33 200Ͳ1038 Oilretainer 1

34 300Ͳ1011 Needleplate 1

35 300Ͳ1012 Pinshaft 1

36 200Ͳ1042 Threadreleasinglever 1

37 200Ͳ1043 Rightslidingplate 1

38 200Ͳ1041 Leftslidingplate 1

39 200Ͳ1045 Rubberplug 1

40 200

Ͳ1048 Cover 1

41

200Ͳ1050

Rubberplug 1

42 200Ͳ1040 Springretainingplate 1

43 100Ͳ1034 Screw 1

44 300Ͳ1013 ThreadtensionComplete 1

45 200Ͳ1073 Screw 2



1.P2339RBArmParts

Line PartNumber Description Qt. Notes

46 200Ͳ1049 Threadreleasingplate 1

47 200Ͳ1089 Threadreleasingspring 1

48 200Ͳ1053 Screw 1

49 200Ͳ1055 Threadreleasingmovinglever 1

50 200Ͳ1059 Screw 1

51 200Ͳ1059 Settingplate 1

52 200Ͳ1061 Ring 1 GB8965

53 200Ͳ1063 Threadtensionplate 1

54 200Ͳ1250 Screw 1

55 200Ͳ1066 Spring 1

56 200Ͳ1068 Threadtensionbutton 1

57 200Ͳ1069 Nut 2

58 300Ͳ1014 Screw(long) 1

59 200Ͳ1071 Screw 1

60 200Ͳ1074 Smallthreadtensionplate 4

61 200Ͳ1075 Spring 2

62 200Ͳ1078 Nut 2

63 200Ͳ1080 Threadguidepin 3

64 200Ͳ1082 Threadfinger 1

65 200Ͳ1025 Screw 1

66 200Ͳ1085 Thread

releasingplate

2

67 200Ͳ1087 Spring 2

68 200Ͳ1088 Stoppingplate 2

69 200Ͳ1090 Nut 2

70 200Ͳ1091 Threadtensionplate 4

71 200Ͳ1062 Threadreleasingpin 1

72 300Ͳ1015 Screw(right) 1

73 200Ͳ1094 Screw(left) 1

74 200Ͳ1064 Nut 1

75 300Ͳ1016 Bushing 1

76 200Ͳ1077 Screw 1

77 200Ͳ1079 Positionbracket 1

78 300Ͳ1017 Guidebushing 1

79 300Ͳ1018 Settingscrew 1

80 200Ͳ1059 Bushing 1

81 200Ͳ1096 Threadcontrolplate 2

82 300Ͳ1020 ThreadtakeͲupspring 1

83 300Ͳ1021 Threadfinger 1

84 200Ͳ1095 ThreadtakeͲupspring 1

85 300Ͳ1022

Screw 1

86 300Ͳ

1023 Shaft 1

87 200Ͳ1084 Screw 1

88 200Ͳ1098 Threadreleasingpin(long) 1

89 200Ͳ1099 Threadreleasinglever 1

90 200Ͳ1079 Positionplate 1



2.P1255RBArmParts

Line PartNumber Description Qt. Notes

1 200Ͳ1002 Bed 1

2 200Ͳ1003 Arm 1

3 200Ͳ1005 Pin 2 GB/T1176x30

4 200Ͳ1007 Screw 1 GB/T70.1M10x25

5 200Ͳ1009 Screw 3 GB/T5781M10x30

6 200Ͳ1012 Trademark 1

7 200Ͳ1014 Screw 2 GB8272x5

8 200Ͳ1016 Upperthreadguide 1

9 200Ͳ1017 Screw 2 SM11/64"x40/8

10 200Ͳ1018 Backcover 1

11 200Ͳ1019 Screw 15 SM11/64"x40/9

12 200Ͳ1377 Washer 15

13 200Ͳ1020 Cover 2

14 200Ͳ1023 ThreadtakeͲupleverguard 1

15 200Ͳ1024 Backfrontcover 1

16 200Ͳ1025 Screw 1

17 200Ͳ1026 Lowerthreadfinger 1

18 200Ͳ1027 Oilfelt 1

19 200Ͳ1028 Screw 2

20 200Ͳ1029 Screw 1

21 200Ͳ

1030 Screw 1

22

200Ͳ1031 Middle

threadfinger 1

23 200Ͳ1032 Rubberplug 2

24 200Ͳ1033 Faceplate 1

25 200Ͳ1034 screw 2

26 200Ͳ1035 Upperthreadguide 1

27 200Ͳ1036 Guidesetplate 1

28 200Ͳ1037 Setplate 1

29 200Ͳ1038 Oilretainer 1

30 200Ͳ1039 Needleplate 1

31 200Ͳ1040 Springretainingplate 1

32 200Ͳ1042 Threadreleasinglever 1

33 200Ͳ1043 Rightslidingplate 1

34 200Ͳ1041 Leftslingplate 1

35 200Ͳ1045 Rubberplug 1

36 200Ͳ1048 Cover 1

37 200Ͳ1050 Rubberplug 1

38 200Ͳ1046 ThreadtensionComplete 1

39 200Ͳ1073

Screw 2

40 200Ͳ1049

Threadreleasingplate 1

41 200Ͳ1089 Threadreleasingspring 1

42 200Ͳ1053 Screw 1

43 200Ͳ1055 Threadreleasingmovinglever 1

44 200Ͳ1059 Screw 1

45 200Ͳ1059 Settingplate 1



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Consew P1255RB User manual

Consew P1255RB User manual

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